Last Updated
：2025/11/22
ball of the thumb
（ plural ）
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(anatomy, informal) The fleshy portion, opposite the nail, of the first segment (first phalange) of the human thumb.
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ball of the thumb
She accidentally burned the ball of the thumb while taking the pie out of the oven.
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She accidentally burned the ball of the thumb while taking the pie out of the oven.
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